Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC3530
Edited by the Electronicstalk Editorial
Team on 12 April 2007
Convertor IC can cope with battery
fluctuations
Synchronous buck-boost convertor delivers up to 600mA of output current to a regulated output voltage with inputs above, below or equal to the output.
The LTC3530 from Linear Technology is a synchronous buck-boost convertor that delivers up to 600mA of output current to a regulated output voltage with inputs above, below or equal to the output Its input range of 1.8 to 5.5V and output range of 1.8 to 5.25V is compatible with single cell Li-ion or dual-cell alkaline/NiCad/NiMH applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The topology incorporated in the LTC3530 provides a continuous transfer mode through all operating modes, making it ideal for applications that must maintain a constant output voltage even as the battery voltage declines below the output.
In many cases this can add up to 20% more battery runtime.
The LTC3530's constant switching frequency provides low noise and is user programmable from 300kHz to 2MHz, allowing optimisation between efficiency and solution size.
The combination of compact externals and a 3 x 3mm DFN or MSOP-10 package provide a tiny solution footprint, usually required in handheld applications.
The LTC3530 includes two N-channel MOSFETs and two P-channel MOSFETs (0.21 and 0.24ohm, respectively) to deliver efficiencies of up to 96%.
Programmable Burst Mode operation allows the user to adjust the load current at which Burst Mode initiates.
Burst Mode operation requires only 40uA of quiescent current and shutdown current is less than 1uA, further extending battery run-time.
Other features include soft-start, current limiting, thermal shutdown and output disconnect.
The LTC3530EDD is available from stock in a 10-lead DFN package and the LTC3530EMS is available in a 10-lead MSOP package.
Pricing for both versions is US $2.75 each for 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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